Southern California -- this just in

New push to find missing Fox movie executive

The family of 20th Century Fox executive Gavin Smith will address the media Tuesday as authorities continue to probe his disappearance.

Law enforcement sources said a reward will be announced.

Smith was last seen May 1. Since his disappearance, deputies and volunteers have combed the areas where he was last seen. Advertisements on local movie screens have asked for the public's help.

But there have been few clues or leads in the mystery.

Sheriff's officials say they do not suspect foul play at this stage.

The department has received many tips, but detectives still don't have a firm sense of what happened.

In interviews last month, Smith's family described some of the circumstances leading up to the night he vanished. Smith was staying with a friend near Ventura County's Oak Park neighborhood but drove away in his Mercedes between 9 and 10 p.m. without telling anyone, which the family said was unusual.

Wearing purple athletic pants belonging to one of his sons, Smith left behind his cellphone charger, shaving kit and other items.

Smith's family said he hasn't been to his Calabasas office since he disappeared. They declined to elaborate on why he was staying with the friend instead of at the family home in West Hills, but Evan Smith tweeted last month that his father had left the family.

"Thoughts and prayers out to my amazing Mom and bros plz," he wrote in an April 14 message. "My dad decided to leave the family last nite. Real family sticks together."

The tweet has since been deleted, but Evan Smith told E! News his parents were not separated.

"They were just going through normal stuff couples go through," he said.

Evan Smith told The Times his family was "devastated" by his father's disappearance but was "staying strong." They've created a website, findgavinsmith.com, to help coordinate search efforts.

Smith is 6 feet 6, weighs 210 pounds and has a goatee and gray hair streaked with blond. He was last seen in his black 2000 Mercedes 420-E with California license plate 6EKT044.

Investigators are asking that anyone with information call (323) 890-5500.